Fix event warning crash when a listener is removed while dispatching event

components/test_runner/test_runner.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_TEST_RUNNER_TEST_RUNNER_H_
 #define COMPONENTS_TEST_RUNNER_TEST_RUNNER_H_
 
 #include <stdint.h>
 
 #include <deque>
@@ skipping 143 matching lines @@
   void setToolTipText(const blink::WebString&);
   void setDragImage(const blink::WebImage& drag_image);
   bool shouldDumpNavigationPolicy() const;
 
   bool midiAccessorResult();
 
   // Methods used by MockColorChooser:
   void DidOpenChooser();
   void DidCloseChooser();
 
+  bool ShouldDumpConsoleMessages() const;
+
   // A single item in the work queue.
   class WorkItem {
    public:
     virtual ~WorkItem() {}
 
     // Returns true if this started a load.
     virtual bool Run(WebTestDelegate*, blink::WebView*) = 0;
   };
 
  private:
@@ skipping 269 matching lines @@
 
   // This function sets a flag to dump the drag image when the next drag&drop is
   // initiated. It is equivalent to DumpAsTextWithPixelResults but the pixel
   // results will be the drag image instead of a snapshot of the page.
   void DumpDragImage();
 
   // Sets a flag that tells the WebTestProxy to dump the default navigation
   // policy passed to the decidePolicyForNavigation callback.
   void DumpNavigationPolicy();
 
+  // Controls whether console messages produced by the page are dumped
+  // to test output.
+  void SetDumpConsoleMessages(bool value);
+
   ///////////////////////////////////////////////////////////////////////////
   // Methods interacting with the WebTestProxy
 
   ///////////////////////////////////////////////////////////////////////////
   // Methods forwarding to the WebTestDelegate
 
   // Shows DevTools window.
   void ShowWebInspector(const std::string& str,
                         const std::string& frontend_url);
   void CloseWebInspector();
@@ skipping 169 matching lines @@
   std::set<blink::WebWidget*> widgets_with_scheduled_animations_;
 
   base::WeakPtrFactory<TestRunner> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TestRunner);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_TEST_RUNNER_H_